Elevator-lock.



L. P. WINNER. ELEVATOR LOOK. APPLICATION FILED JUNE 21, 1913.

PatenLea Jan. 20, 1914.

2 SHEETS-SHEET 1.

1\ i I 1 ammw Q b P; Winner. wi/bnzm APPLICATION FILED JUNE 21, 1913,

L. P. WINNER. ELEVATOR LOCK.

Patented J 811.20, 1914.

2 SHBBTSSHEETYZ. F 1 5- 17' mnrnn erases refrains ofi nicn 4 LEVI P. WINNER, OF GROVE CITY, PENNSYLVANIA.

ELEVATOR-LOCK.

messes.

To all whomz't may concern;

'Be it known that'I, Lnvr P. WINNER, a citizen of the United States, residingat Grove City,- in the county of Mercer and State of Pennsylvania, have invented certain new and useful linproi ements in Elevator- Locks; and I do hereby declare the following to'be a full, clear, and exact description of the invention, such as will enable others skilled in the artto which it appertains to mnke and use the same. I

"elevator cab against rapid downward n'1ove.-

' the e evator shaft in the vent that the cablenoted in entireties by the numerals 4 and 5;

This invention relates to new and useful improvements in safety devices, and has particular reference to that type of such inventions which are employed with the usual freightor passenger elevators to automatically grip the beam guides and hold the ment'in the event of the cable by which the elevator cab is raised and lowered being broken.

A still further object of the invent-ion contemplates the provision of a device of the character above set forth, which may be operated from within the elevator cab-to brin it to a complete stop at any point in operating the elevator is broken.

The above and additional objects are accomplished by such means as are illustrated in the preferred embodiment in the accompanyin drawings, described in the following specification and then more particularly brought out in the claims which are appended hereto and form apart of this application.

With reference to the drawings throughout which similar numerals designate corresponding parts;.l ig'ure 1 is a front elevation of an, elevator equipped with the safety stop device of this invention. Fig. 2 is a section on the line 2-2 of-Fig, 1. Fig. 3 is a side elevation. Fig. i is a top plan.

- view. Fig. 5 is a detail view illustrating the manner in which the first cable of the ele vator is connected to the various cables which operate the safety stop members. v

Proceeding now to the descriptionof the drawings, the numeral 1 designates as an entirety the elevated body or cab which is of the usual type, and is guided and held gainstshifting during its manipulation by a pair of guide beams 2 and 8. a

To the-side walls of the elevator body are secured the beam engaging devices which aresimilar in (zonstructionand are desig- Specification of Letters Patent. p w e g 2Q 19 Application filed June 21 1913. Serial No. 775,161.

Referring now more particularly' to, Fig. 3,; I

in which the stop device 4 is illustrated in rollers 10 of the beam 2, each of the beam" members has been provided with the retractlve spiral spring 12, the upper terminal of 'WlllCll 1s secured to an apertured ear,

. which is formed terminally of the dog and the lower end. of which is secured as at 14k to a lug or other similar and suitable fasretractive type would normally not to swing the-dogs 6 and 'F on their pivots 8 and 9,

producing gripping engagement ofthe rollers 10 with the side beam 2, thus retarding, I the downward movement of the'elevator cab. It is of course obvious, however, that it. ,is'

not desirable to normally maintain the members 10 in engagement with the side beam 2 and there has therefore b en provided a device operatively connected to the cable 11 for normally'maintaining therollers 10 in spaced relation to the beam 2. This device of cable mein consists essentially in the pa hers l5 and 16 which arranged upon both sides of the elevator cab and are connected at their one terminal to the menibers 6 and 7, as at 17 and 18, and are attached at their other terminals to the cable .11. -lhe cable 11 is connected to the ele- Relative to the method of attaching thecables 15 and 16 to the hoist cable '11 of the elevator, it is desirable to emphasize the fact that while this method has been found practical and-eficient in reduction to practice, this invention nevertheless comprehends the attachment of the cables 15 and 16. directly to the ring 19. In this connection it is to beobserved that by attaching the cables 15 and-16 directly to the ring 19, all possibility of inoperation of the device in the event that the-cable 11 is broken between the ring 19 and the attaching point of the cablesl5 and 16 is effectively/guarded against, andthat a break at a-ny portion of the cable 11 whether it be at the terminal thereof connected at the ring 19, or any point intermediate the length thereof, will automatically operate to efiect the movement of the rollers 10 and 11 in an operative gripping relation to the opposite sides of the member 2, as will be hereinafter more fully disclosed in that portion of the speci fication devoted to the description of the operation of this invention.

The mechanism heretofore described has been that designated in Fig. 1, as an entirety by the numeral 4. The mechanism designated in Fig. 1 by the numeral 5 is similar in every detail to the mechanism 4, and need not therefore be described in detail.

As a means for increasing the gripping action of the members 10 on the beam 2 when the hoist cable 11 is accidentally broken, there has been provided a pair of draw cables 22 and 23 which are designed to be hung on the drum 24, rotatably mounted on the side wall of the elevator body and interiorly thereto. This-member 2a is of the ordinary type and is provided with the customary handle 25. The cables 22 and 23 are directed over guide pulleys 26 and 27 through openings 28 and 29, formed in the! side wall of the elevator body and are attached to the members 13 as illustrated most clearly in Fig. 3.

From the foregoing it will be apparent that in case the cable 11 breaks, the tension on the cables 15 and 16 will be removed, -permitting the springs 12 to swing the rollers I 10 into gripping engagement with the beam In order to limit the movement of the members 6 and 7, when they are swung into gripping relation with the member 2, there has been provided a pair of stop irons 30 and 31, which are bolted or otherwise secured to the side wall of the elevator body and are disposed to prevent the swinging of the members 6 and 7 beyond a horizontal position when the rollers .10 are swung upwardly by the springs 12. It will be further observed that by rotating the member 241, pressure may be brought upon the rollers 10 to effect a complete stopping of the elevator cab.

In reduction to practice, I have found that the form of my invention, illustrated in the drawings and referred to in the above description, as the preferred embodiment, is the most eflicient and practical; yet realizing that the conditions concurrent with the adoption of my device will necessarily vary, I desire to emphasize the fact that various minor changes in details of construction, proportion and arrangement of parts may be resorted to, when required, without sacrilicing any of the advantages of my invention, as defined in the appended riaims.

co ra er tam patent may be obtained for Having thus described my invention, what I claim is 1. The combination with an elevator cab mounted for sliding movement between a pair of vertical guide beams, of a safety stop device for each side wall of the cab, said safety stop device comprising pairs of pivoted dog members arranged upon opposed sides of the cab, rollers journaled in the inner terminals of the dog members, a coiled spring for each of the dog members, each spring being secured terminally to the elevator cab and the outer end of the respective dog, a flexible cable connected with the outer terminal of each of the dog members, a hoist cable, a ring, a flexible link connecting the ring with the elevator cab at the top thereof,

said hoist cable secured to said ring and the other terminals of the first named cables connected with the hoist cable above the point of its connection withthe ring, and said coiled springs being adapted to actuate the dogs aforesaid to move the rollers thereon into frictional engagement with the vertical guide beams should the hoist cable be accidentally broken.

2. The combination with an elevator cab mounted for sliding movement between a pair of vertical guide beams, of a hoist cable,

a ring connected with the top of the elevator cab, a flexible link for connecting the ring with the cab, a plurality of pivoted dog members arranged upon opposite sides of the cab, a coiled spring for each of the dog members, said springs being connected at their terminals with the outer ends of the respective dog members and the elevator cab respectively, said hoist cable secured to said ring, a cable for each of the dog members secured at one terminal to the outer ends of the respective dog members and at their other terminals to the hoist cable at a point above its connection with the ring, a plurality of guide pulleys upon the top of the cab for the cables secured to the dog members', a pair of cables for certain of the dog members connected at one terminal to the outer ends of the respective dog members and extending through the springs and into the elevator cab, and means mounted within the cab for pulling said last named cables to cause the dog members to move into gripping engagement with the guide means,

comprising a rotatable member journalcd within the cab and connected with said last named cables.

In testimon whereof I affix my signature in presence 0 two witnesses. e

LEVI P. WIN NER.

Witnesses:

N. C. DAVIS, M. It. Witson.

five cents each, by addressing the Commissioner oi Patents, Gashington, F C. 

